Data collection was supported by research grants from the National Institute of Mental Health (R01-MH37296) and the National Institute of Justice (85-IJ-CX-0042) awarded to Patricia A. Resick. We would like to extend our sincere appreciation to the Conference on Innovations in Trauma Research Methods' Executive Planning Committee for their efforts in organizing such an informative and engaging conference.
Special Section: Innovations in Trauma Research Methods, 2008
Multilevel regression analyses to investigate the relationship between two variables over time: Examining the longitudinal association between intrusion and avoidance†
Article first published online: 23 NOV 2009
Copyright © 2009 International Society for Traumatic Stress Studies
Journal of Traumatic Stress
Special Issue: Special Section: Innovations in Trauma Research Methods, 2008
Volume 22, Issue 6, pages 622–631, December 2009
How to Cite
Suvak, M. K., Walling, S. M., Iverson, K. M., Taft, C. T. and Resick, P. A. (2009), Multilevel regression analyses to investigate the relationship between two variables over time: Examining the longitudinal association between intrusion and avoidance. J. Traum. Stress, 22: 622–631. doi: 10.1002/jts.20476
- Issue published online: 21 DEC 2009
- Article first published online: 23 NOV 2009
Multilevel modeling is a powerful and flexible framework for analyzing nested data structures (e.g., repeated measures or longitudinal designs). The authors illustrate a series of multilevel regression procedures that can be used to elucidate the nature of the relationship between two variables across time. The goal is to help trauma researchers become more aware of the utility of multilevel modeling as a tool for increasing the field's understanding of posttraumatic adaptation. These procedures are demonstrated by examining the relationship between two posttraumatic symptoms, intrusion and avoidance, across five assessment points in a sample of rape and robbery survivors (n = 286). Results revealed that changes in intrusion were highly correlated with changes in avoidance over the 18-month posttrauma period.